Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B51/00—Tools for drilling machines
  • B23B51/06—Drills with lubricating or cooling equipment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
  • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
  • B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/14—Cutters, for shaping with means to apply fluid to cutting tool
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T408/00—Cutting by use of rotating axially moving tool
  • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
  • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct

Definitions

• the invention relates to a tool which has a shaft with a centrally arranged, continuous inner channel and an insert projecting into the inner channel and frictionally and / or positively connected to the shaft.
• one-piece drilling tools which have a shaft and one or more inside the shaft tes rectilinear or spirally extending, serving as cooling channels inner channels.
• cooling liquid is forced through the cooling channels in the direction of the tool head during operation to cool the working area of the drilling tool.
• the object of the invention is to provide a new tool whose cooling is improved during operation.
• This object is achieved by a tool having the features specified in claim 1.
• a tool according to the invention has a shaft with a central, continuous inner channel and an insert projecting into the inner channel and frictionally and / or positively connected to the shaft, wherein the inner channel is provided with one or more widenings.
• Advantageous embodiments and further developments of the invention are specified in the dependent claims.
• the advantages of the invention are, in particular, that during the operating mode of the tool, a cooling liquid from the rear end of the shaft through the inner channel and the widenings of the inner channel in the direction of Häflä- che of the tool can be pressed.
• the expansions mentioned can be introduced in a simple manner within the framework of the production of the shank. This is preferably done during the production of a blank by means of an extrusion process and / or using a broach, by means of which the widenings of the inner channel are introduced starting from an initially cylindrical inner channel, or by erosion.
• the shank and the insert are preferably cylindrical, with the diameter of the shank being greater than the diameter of the insert.
• the insert can be glued, soldered, shrunk or screwed to the shaft.
• the shaft can be made of the same material as the insert or of another material.
• the shank made of steel, hard metal, ceramic or plastic and the use of steel, hard metal or ceramic.
• the widenings are preferably part-circular, rectangular or triangular in shape. The number of widenings is preferably 1, 2, 3, 4 or 5.
• the tool is preferably a drilling tool or a milling tool, in particular for use in the micro-drilling area or in the dental area.
• the widenings form the insert in a straight line or spirally surrounding channels. They can extend over the entire length of the inner channel or only a part of the entire length of the inner channel. Further advantageous features of the invention will become apparent from the following exemplary explanation with reference to FIGS. 1 shows a sketch of a longitudinal sectional view of a tool according to a first exemplary embodiment of the invention
• FIG. 2 shows a sketch of a longitudinal sectional illustration of a tool according to a second exemplary embodiment of the invention
• FIG. 4 cross-sectional representations for explaining tools with rectangular widenings of the inner channel
• FIG. 5 cross-sectional views for explaining tools with triangular widenings of the inner channel and Figure 6 sketches of embodiments for equipped with inner channels inserts.
• FIG. 1 shows a sketch of a longitudinal sectional view of a tool according to a first embodiment of the invention.
• a drilling tool which is intended for use in the micro drill field or in dental technology.
• This drilling tool has a shaft 1, a centrally disposed inside the shaft 1, continuous inner channel 2, a projecting into the inner channel 2, with the shaft 1 positively and / or positively connected insert 3 and one or more widenings 4 of the inner channel 2.
• the overall length of the gate i and thus also of the inner channel 2 is 11.
• the widenings 4 are straight and extend over the entire length of the shank 1. The length of the widenings 4 is therefore also 11.
• Shaft 1 is connected to the insert 3 is designated in the figure 1 with 13.
• the diameter of the shaft 1 is denoted by dl. It can be seen from FIG. 1 that the diameter d 1 of the shank 1 is greater than the diameter d 2 of the insert 3.
• the inner channel 2 and the widenings 4 are preferably introduced into a tool blank during the production of the shank 1 by an extrusion press method.
• the inner channel 2 and the widenings 4 can also be introduced by means of a broach into a tool blank or produced by erosion.
• the insert 3 is inserted into this shaft 1 and connected to the shaft 1 in a positive-locking and / or force-locking manner, for example by soldering, gluing, bonding shrink or a verse roar.
• the cutting edge located at the front end of the insert may be completed before or after attachment of the insert to the shaft.
• 2 shows a sketch of a longitudinal sectional view of a tool according to a second embodiment of the invention.
• a drilling tool which is intended for use in micro drill or in dental technology.
• the tool shown in FIG. 2 largely coincides with the tool shown in FIG. In the following, therefore, only the differences from the tool shown in FIG. 1 will be explained.
• the widenings 4 do not extend over the entire length 11 of the inner channel 2, but only over a partial area 12 of the entire
• This part 12 comprises the part 13 of the entire length of the inner channel 2, in which the shaft 1 is connected to the insert 3, and an adjoining part 14 of the entire length of the inner channel second
• the inner channel 2 of the shaft 1 is introduced by an extrusion tool or by means of a Aus Hurmtechnikmaschinees in a blank. Thereafter, by means of a Aus Hurmtechnikmaschinees an introduction of the widenings 4 to form a blank, which has the desired shape. This is then further processed to the desired end product, namely to a shank.
• the insert 3 is inserted and connected to the shaft 1 positive and / or non-positively.
• 3 shows a total of lunf cross-sectional views for explaining tools that have part-circular widening of the inner channel 2.
• the tool shown in FIG. 3 a has a shank 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has a part-circular widening 4.
• the tool shown in FIG. 3 b has a shank 1 in which a centrally arranged inner channel 2 is provided, the inner channel 2 having two part-circular widenings 4.
• the tool shown in Figure 3c has a shaft 1, in which a centrally disposed inner channel 2 is provided, wherein the inner channel 2 has three part-circular widenings 4.
• the tool shown in FIG. 3d has a shaft 1 in which a centrally disposed inner channel 2 is provided, wherein the inner channel 2 has four part-circular widenings 4.
• the tool shown in Figure 3e has a shaft 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has five part-circular expansions 4. Those edge regions of the inner recess 2 of the shank 1, on which no widenings 4 are provided, serve for the positive and / or non-positive connection of the shank with the insert.
• FIG. 4 shows a total of five cross-sectional illustrations for explaining tools which have rectangular widenings of the inner channel 2.
• the tool shown in FIG. 4 a has a shaft 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel has a rectangular widening 4.
• the tool shown in FIG. 4 b has a shank 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has two rectangular widenings 4.
• the tool shown in Figure 4c has a shaft 1, in which a centrally disposed inner channel 2 is provided, wherein the inner channel 2 has three rectangular widenings 4.
• the tool shown in FIG. 4 a has a shaft 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has three rectangular widenings 4.
• FIG. 4 d has a shaft 1, in which a centrally arranged inner channel 2 is provided, wherein ⁇ er inner channel 2 has four rectangular widenings 4.
• the tool shown in FIG. 4e has a shaft 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has five rectangular widenings 4. Those edge regions of the inner recess 2 of the shank 1, on which no widenings 4 are provided, serve for the positive and / or non-positive connection of the shank with the insert.
• Figure 5 shows a total of five cross-sectional views for explaining tools having triangular widenings of the inner channel.
• FIG. 5 a has a shank 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has a triangular widening 4.
• the tool shown in FIG. 5b has a shaft 1, in which a centrally arranged inner channel 2 is provided, the inner channel 2 having two triangular widenings 4.
• the tool shown in FIG. 5 c has a shank 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has three triangular widenings 4.
• FIG. 5 d has a shaft 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has four triangular extensions 4.
• 5e has a shaft 1, in which a centrally arranged inner channel 2 is provided, wherein the inner channel 2 has five triangular widenings 4. Those edge regions of the inner recess 2 of the shank 1, on which no expansions 4 are provided, serve for positive and / or non-positive connection of the shank with the insert.
• the tool is in each case a drilling tool.
• the tool may also be a milling tool.
• the shank of the tool and the use of the tool can be made of the same material or of different materials.
• the shaft 1 is made of steel, hard metal, ceramic or plastic and the insert 3 made of steel, hard metal or ceramic.
• the widenings 4 may be rectilinear as in the above embodiments and extend in the longitudinal direction of the cylindrical shaft. Alternatively, the widenings may surround the part of the insert 2 inserted into the shaft 1 in a spiral shape.
• internal channels can also be provided in the insert 3 themselves, which serve as cooling channels during operation of the respective tool and through which the respective coolant flows.
• These inner channels of the insert 3 may be spirally extending or rectilinear inner channels. Examples of such inner channels of the insert 3 are shown in FIG. 6 and designated there by the reference symbols 3a, 3b, 3c, 3d and 3e.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Drilling Tools (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42752156

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (9)

Citations (3)

Family Cites Families (23)

• 2009
  • 2009-08-25 DE DE102009043850A patent/DE102009043850A1/de not_active Ceased
• 2010
  • 2010-06-21 EP EP10730402A patent/EP2470321A1/de not_active Withdrawn
  • 2010-06-21 JP JP2012525945A patent/JP2013503046A/ja active Pending
  • 2010-06-21 WO PCT/EP2010/058693 patent/WO2011023428A1/de active Application Filing
  • 2010-06-21 US US13/389,917 patent/US20120163931A1/en not_active Abandoned

Patent Citations (3)

Non-Patent Citations (1)

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